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  • 1
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    IRAP identifies an endosomal compartment required for MHC class I cross-presentation (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-06-06
    Description: Major histocompatibility complex (MHC) class I molecules present peptides, produced through cytosolic proteasomal degradation of cellular proteins, to cytotoxic T lymphocytes. In dendritic cells, the peptides can also be derived from internalized antigens through a process known as cross-presentation. The cellular compartments involved in cross-presentation remain poorly defined. We found a role for peptide trimming by insulin-regulated aminopeptidase (IRAP) in cross-presentation. In human dendritic cells, IRAP was localized to a Rab14+ endosomal storage compartment in which it interacted with MHC class I molecules. IRAP deficiency compromised cross-presentation in vitro and in vivo but did not affect endogenous presentation. We propose the existence of two pathways for proteasome-dependent cross-presentation in which final peptide trimming involves IRAP in endosomes and involves the related aminopeptidases in the endoplasmic reticulum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Saveanu, Loredana -- Carroll, Oliver -- Weimershaus, Mirjana -- Guermonprez, Pierre -- Firat, Elke -- Lindo, Vivian -- Greer, Fiona -- Davoust, Jean -- Kratzer, Roland -- Keller, Susanna R -- Niedermann, Gabriele -- van Endert, Peter -- New York, N.Y. -- Science. 2009 Jul 10;325(5937):213-7. doi: 10.1126/science.1172845. Epub 2009 Jun 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉INSERM, U580, 75015 Paris, France; Universite Paris Descartes, Faculte de Medecine Rene Descartes, 75015 Paris, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19498108" target="_blank"〉PubMed〈/a〉
    Keywords: Adoptive Transfer ; Animals ; *Antigen Presentation ; CD8-Positive T-Lymphocytes/immunology ; *Cross-Priming ; Cystinyl Aminopeptidase/*metabolism ; Dendritic Cells/enzymology/*immunology/metabolism ; Endosomes/*enzymology ; Epitopes ; HLA Antigens/immunology/metabolism ; Histocompatibility Antigens Class I/*immunology/*metabolism ; Humans ; Mice ; Mice, Knockout ; Phagocytosis ; Phagosomes/enzymology ; Proteasome Endopeptidase Complex/metabolism ; Substrate Specificity
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Immunodeficiency in protein kinase cbeta-deficient mice (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-08-09
    Description: Cross-linking of the antigen receptor on lymphocytes by antigens or antibodies to the receptor results in activation of enzymes of the protein kinase C (PKC) family. Mice homozygous for a targeted disruption of the gene encoding the PKC-betaI and PKC-betaII isoforms develop an immunodeficiency characterized by impaired humoral immune responses and reduced cellular responses of B cells, which is similar to X-linked immunodeficiency in mice. Thus PKC-betaI and PKC-betaII play an important role in B cell activation and may be functionally linked to Bruton's tyrosine kinase in antigen receptor-mediated signal transduction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Leitges, M -- Schmedt, C -- Guinamard, R -- Davoust, J -- Schaal, S -- Stabel, S -- Tarakhovsky, A -- New York, N.Y. -- Science. 1996 Aug 9;273(5276):788-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Delbruck-Laboratorium in der Max-Planck-Gesellschaft, Carl-von-Linne-Weg 10, D-50829 Koln, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8670417" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/*immunology ; Gene Targeting ; Genetic Linkage ; Immunoglobulin G/blood ; Immunoglobulin M/blood/immunology ; Immunoglobulins/*blood ; Immunologic Deficiency Syndromes/enzymology/*immunology ; Lymphocyte Activation ; Lymphocyte Count ; Mice ; Protein Kinase C/deficiency/genetics/*physiology ; Protein Kinase C beta ; Protein-Tyrosine Kinases/genetics/metabolism ; Receptors, Antigen, B-Cell/immunology ; Signal Transduction ; T-Lymphocytes/immunology ; X Chromosome
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Vaccine activation of the nutrient sensor GCN2 in dendritic cells enhances antigen presentation (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-12-07
    Description: The yellow fever vaccine YF-17D is one of the most successful vaccines ever developed in humans. Despite its efficacy and widespread use in more than 600 million people, the mechanisms by which it stimulates protective immunity remain poorly understood. Recent studies using systems biology approaches in humans have revealed that YF-17D-induced early expression of general control nonderepressible 2 kinase (GCN2) in the blood strongly correlates with the magnitude of the later CD8(+) T cell response. We demonstrate a key role for virus-induced GCN2 activation in programming dendritic cells to initiate autophagy and enhanced antigen presentation to both CD4(+) and CD8(+) T cells. These results reveal an unappreciated link between virus-induced integrated stress response in dendritic cells and the adaptive immune response.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4048998/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4048998/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ravindran, Rajesh -- Khan, Nooruddin -- Nakaya, Helder I -- Li, Shuzhao -- Loebbermann, Jens -- Maddur, Mohan S -- Park, Youngja -- Jones, Dean P -- Chappert, Pascal -- Davoust, Jean -- Weiss, David S -- Virgin, Herbert W -- Ron, David -- Pulendran, Bali -- 084812/Wellcome Trust/United Kingdom -- 084812/Z/08/Z/Wellcome Trust/United Kingdom -- N01 AI50019/AI/NIAID NIH HHS/ -- N01 AI50025/AI/NIAID NIH HHS/ -- P51 OD011132/OD/NIH HHS/ -- R37 AI048638/AI/NIAID NIH HHS/ -- R37 DK057665/DK/NIDDK NIH HHS/ -- R56 AI048638/AI/NIAID NIH HHS/ -- U19 AI057266/AI/NIAID NIH HHS/ -- U19 AI090023/AI/NIAID NIH HHS/ -- U54 AI057157/AI/NIAID NIH HHS/ -- U54 AI057160/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2014 Jan 17;343(6168):313-7. doi: 10.1126/science.1246829. Epub 2013 Dec 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Emory Vaccine Center, Yerkes National Primate Research Center, Emory University, 954 Gatewood Road, Atlanta, GA 30329, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24310610" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antigen Presentation ; CD4-Positive T-Lymphocytes/immunology ; CD8-Positive T-Lymphocytes/immunology ; Cell Line ; Cricetinae ; Dendritic Cells/enzymology/*immunology ; Enzyme Activation ; Humans ; Mice ; Mice, Inbred C57BL ; Mice, Mutant Strains ; Microtubule-Associated Proteins/genetics ; Protein-Serine-Threonine Kinases/*biosynthesis/genetics ; Yellow Fever Vaccine/*immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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